https://oeis.org/A007477 https://oeis.org/A007477 “For n>=2, a(n) gives number of possible ways to parse an English sentence consisting of just n+1 copies of w

https://oeis.org/A007477 https://oeis.org/A007477 “For n>=2, a(n) gives number of possible ways to parse an English sentence consisting of just n+1 copies of word "buffalo", with one particular "plausible" grammar.”